Black Algae in saltwater pool

[CarlD]

You might think that kelemvor's, Watermom's and my advice are contradictory, but they are NOT.

'mom's advice is simple: Fix the water first by manual tried-and-true methods before you attack your SWCG and potential problems.

kelemvor's advice is simple as well: See if you have a leak. THEN seek out whether your SWCG is giving you bad readings. And a confirming test kit for salt levels is something EVERY SWCG owner should have, even if you almost never need to use it.

My advice is on how to clear the pool and what NOT to do (add acid).

So...work on clearing the water and finding the leak. When that's done, address what's going on with your SWCG.

[stephen2UK]

I sent a lengthy reply, which does not appear to have posted, however I short - many thanks, I will employ all of your suggestions.

Pool was shocked with cal-hypo 73%
SWCG appears to be working fine, will switch off whilst using bleach
Water drops 3-4 inches per week in summer, but a lot less in winter - pump running each time, suggests no major leak
Will buy test kit as suggested, thanks for links
Muriatic acid is back on the shelf to gather dust
Will increase brushing as much as possible - loooooong hours at work

Thanks for all the advice

[Watermom]

Stephen, when you post it will go into a moderation queue to be approved by one of us before it will appear on the forum. We try and empty out the queue multiple times per day so it usually isn't too long before it appears. A way to avoid the moderation queue is to become a subscriber if you are interested. Subscriber posts also get priority attention when we get really busy.